|Location|Town|Output (MW AC)|Modules|Number of arrays|
|---|---|---|---|---|
|H. Lee Dennison Building|Hauppauge|1.75|7,737|24|
|North County Complex|Hauppauge|0.5|3,431|9|
|Cohalan Court Complex|Central Islip|3.5|15,113|27|
|Riverhead County Center|Riverside|3|11,536|31|
|Brentwood LIRR Parking Lot|Brentwood|1|3,924|11|
|Deer Park LIRR Parking Lot|Deer Park|2.25|3,924|39|
|Ronkonkoma LIRR Parking Lot (south)|Ronkonkoma|5|20,110|44|

Question: what was the number of arrays of the riverhead county center project location?
Answer: 31